Filled-bag-sewing machine



Sept. 28 '1 926.

N. V. CHRISTENSEN FILLED BAG SEWING MACHINE Filed Feb. 9, 1922 3 Sheets-Sheet 1 S ept. 28 ,1926.

1,601,558 N. V. CHRISTENSEN FILLED BAG SEWING MACHINE Filed Feb. 9. 1922 Se 28 192s. 1,601,558

N. V. CHRISTENSEN FILLED BAG SEWING MACHINE Filed Feb. 9, 1922 5 Sheets-Sheet 3 i atented Sept. 28, 1 926 uni'ran STATES PATENT OFFICE.

NORMAN V. CHRISTENSEN, OF CHICAGO, ILLINOIS, ASSIGNOR TO UNION SPECIAL MACHINE COMPANY, OF CHICAGO, ILLINOIS, A'CORPORATION- OF ILLINOIS.

FILLED-BAG-SEW'ING MACHINE.

Application filed February The invention relates to new and useful improvements in sewing machines, and

on the platform of weighing scales or the like.

A further objectof the invention is to provide a filled bag sewing machine of the above type, wherein the sewing machine is mounted so as to travel across the mouth of the bag for stitching the same.

A still further object of the invention is to provide amachine of the above type, wherein the supporting means on which the sewing machine travels during the stitching of the bag may be raised and loweredin order to adapt the machine for stitching bags of different sizes.

A still further object of the invention 13 to provide a machine of the above type with means for supportin the mouth of the bag while the sameis being Stitched and wherein said supporting means is adjustable as a unit with the supporting means for the sewing machine.

These and other objects will in part be obvious and will in part be hereinafter more fully disclosed.

In the drawings which show by way of illustration one embodiment of the inven tion-- *igure 1 is a front view of a filled bag sewing machine embodying my improvements;

Figure 2 is an end View of the same;

Figure 3 is an enlarged detail partly in section, showing the means for adjusting the supporting devices for thesewing machines;

Figure 1 is a sectional view on the line 4 4- of Figure 3;

Figure 5 is a sectional view on the line 5-5 of Figure 1; i

Figure 6 is a front view showing a portlon of one of the sustaining clips for supporting the mouth of the bag.

In carrying out the invention, I have provided a frame structure on which the sewing machine is mounted. 'Said' sewing machine is'supported by a carriage which is mounted to move on tracks forming a part of the supporting structure. The mouth of thebag 9, 1922. Serial 1%, 535,334.

to be stitched is held or supported by a sup porting bar and the sewing machine carriage travels along the tracks while the stitching mechanism stitches and closes the mouth of the bag. The structure for supporting the carriage on which the sewing machine is mounted includes devices which are adjustable vertically so that the machine may bereadily adapted for stitching bags of different heights. The supporting bar which supports the mouth of the bag is adjustable with the sewing machine.

Referring more in detail to the drawings, my improved machine includes a frame structure consisting of two spaced standards 1 and 2 carried respectively by supporting base portions 3 andft. Each base portion is preferably mounted on castors 5-5, and said base portions are connectedv and held in spacedrelation to each other by a brace rod 6 which is placed in rear of. the standards, as clearly shown in Figure 2. The standard 1 includes a lower sleeveportion and an upper section 7 which telescopes into the sleeve portion 1. The standard 2 also includes a section 8 which telescopes into the sleeve portion of said standard 2. Mounted on the upper end of these sections 7 and 8 are brackets 9Iwhich are similar in construction and thesebrackets include outwardly extending portions 10 and 11. In the outwardly extending portion 11 there is a rod 12 which extends from one bracket to the other and forms one member or a track. In the outwardly extending portion 10 there is a rod 13 which likewise extends from one bracket to the other and forms the other member of a track. Mounted on these tracks 12 and 13 is a carriage 1 1. Said carriage is provided with two forward wheels 15 and 16,'each of which is curved in cross section at the tread to conform'to the cross section of the circular rod 12. The carriage is provided with one wheel 17 at the rear which has a flat tread and this fiat treadrests on the rod 13. This insures that the, carriage will run smoothly along the track without any binding. Mounted on this carriage is a depending bracket 18 which extends downwardly between the tracks. Mounted on? the depending bracket 18 is a sewing machine 19, which has an overhanging arm20, in which a needle bar 21 reciprocates, and said needle bar carries a needle 22. The sewing machine also includes a tubular Work support 23, in which is mounted the usual fourmotion feed dog which engages the fabric and instead of feeding the fabric through the machine moves the machine across the fabric, thus moving the carriage along/the tracks. The filled bag is indicated in dotted lines at B.

Mounted on the upper sections 7 and 8 are brackets 2a and 25. These brackets extend forwardly and mounted on the brackets and extending from one bracket to another is a supporting bar 26. Said supporting bar 26 is provided with two spaced clamps 27 and 28. These clamps are shown in detail in Figures 5 and 6. Each clamp is provided with a shoulder 29, which is adapted to extend underneath the bar 26 and with a rearwardly projecting arm 30 which overlies the upper edge of the bar 26. A set screw 31 passing through the arm 30 presses against the upper edge of the bar 26. Each clamp 27 has a roughened surface 82 against which the mouth of the bag is placed. Mounted on each bracket is a. spring clamping finger 33. Said clamping finger is secured to the bracket by means of a bolt 3st and extends outwardly and thence downwardly and inwardly where it is provided with a curved clampingsection 35 which is adapted to press the mouth of the bag against the roughened surface 82. The two clamps engage the mouth of the bag at opposite sides thereof and serve to support the bag mouth holding the same stretched. The bag is adapted to rest on the floor or on the platform of suitable scales, which are indicated in dotted lines in the drawing. The bag is in a fixed position while it is stitched. The mouth of the bag is clamped by two clamps 27 and 28 and this holds the mouth of the bag in the fixed position. During the stitching operation the feed of the sewing machine causes the sewing machine to travel across the mouth of the bag, as clearly indicated in Figure l, where the line of stitching formed by the sewing machine is indicated by s. V V, r I

Thebroad idea of a supporting track on which the carriage is mounted and which supports the sewing machine, adapted to travel across the mouth of the bag, and. the supporting bar for supporting the mouth of the bag while it is being stitched are shown, described and claimed in my co-pending application Serial No. 526,116, filed December 31, 1921.

The present invention is directed particularly to the means whereby the sewing machine and the supporting means therefor, also the supporting means for the mouth of the bag, may be raised or lowered as a unit to adapt the machine for different size bags.

The sections 7 and 8 forming parts of the standards 1 and 2 are each provided with a rack 36. The upper end of the standards 1 and 2 are provided with rearwardly eX- tending bearings'37 and jo-urnaled in said bearings is a shaft 38. Said shaft 38 is pro vided with a hand wheel 39' whereby ,it may be readily turned. Monnted on this shaft are two gears 39 which co-operate respectively with the rack 36 of the two sections 7 and 8. By rotating this shaft the sections 7 and 8 may be readily raised or lowered. The upper end of each standard is split, as indicated at 40, and a clamping bolt all passing therethrough operates to clamp the upper end of the sleeve portion of the standard against the sections telescoping thereinto and thus the upper portion of the frame str' cture may be fixedly held in ad justed positions.

Mounted on the carriage let is a motor 42 which operates through a suitable belt 43 to drive the sewing machine. The main shaft of the sewing machineis indicated at ist. A hand lever lt) carries a switch block 46 for controlling the motor and a brake shoe for stopping the stitching mechanism when the motor is turned off. Thread is supplied to the sewing machine from thread spools al -d7, carried by a standard 48 mounted on the carriage.

it will be noted from the above that the carriage carries motor for driving the same. This carriage runs back and forth on tracks and the tracks are capable of being raised and lowered, thus raising and lowering the sewing machine to position the same for different size bags.

The supporting bar for supporting the mouth of the bag is also mounted on the sections of the frame which are raised and lowered for raising and lowering the tracks. This bar extends between the overhanging arm and the tubular work support of the sewing machine and supports the mouth of the bag so that a line of stitching may be formed in the mouth of the bag below said supporting bar. The support-ing bar being mounted on the sections of the frame-which are raised and lowered ith the raising and lowering of the sewing machine form therewith a unit structure so that by turning the shaft- 88 the machine may be quickly adjusted for different size bags. The bag is placed on the weighing scales and filled to the proper extent, after which it may be stitched without removing it from the scales and after it is closed it maybe removed from the platfo m of the scales. The bags may rest on the floor or a suitable support may be provided for the bags. It will be noted that the standards carrying the tracks for the sewing head are spaced from each other, and the strengthening rod 6 is placed back of the standards so that the weighing scales may be placed between the standards and so positioned that a bag may be placed on said scales, filled, weighed, and the sewing sewing machine and the machine caused to travel across the bag mouth for closing the same. Inasmuch as the tracks are straight tracks, the sewing machine will, of course, stitch a straight line of stitching. The head overhangs the scales so that this straight line of stitching can be placed centrally over the contents of the bag, and thus the bag closed by a straight line of stitching properly placed for the best eriiciency. V

Then again, it will be noted that the standards are mounted on rollers so that the entire machine may be quickly rolled from one place in the mill to another. Furthermore, the tracks are so arranged that the sewing head travels along the same without any lateral rocking. This is accomplished by reason of the fact that the tracks are spaced and there are wheels running on both the front and the rear tracks. By using three wheels, the carriage for the sewing head is held from binding, and it will be properly positioned on the tracks, as well held from rocking.

The essentials of the invention consist in the traveling sewing machine for stitching the mouth of the bag andthe adjustable supporting means therefor, whereby it may be raised and lowered to adapt it for dificrent size bags.

It is obvious that minor changes in the details of construction may be made without departing from the spirit of the invention as set forth in tl e appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

l. A filled bag sewing machine including in combination a supporting frame, a track mounted on said supporting frame, means for raising and lowering the track, a carrier mounted on said track and freely movable back and forth thereon in a straight line, a sewing head mounted on said carrier and having having a stitching mechanism and a feeding mechanism including a feed dog,

said sewing head depending from said carrier and adapted to stitch the mouth of a filled bag supported beneath said track, said track being substantially horizontal whereby the feed dog operating upon the filled bag may be utilized for moving the carrier during the stitching of the bag.

2. A filled bagsewing machine comprising spaced standards, each including telescoping members, brackets carried by the upper members, parallel tracks mounted on said brackets, means for simultaneously raising and lowering the upper telescoping members chine mounted on said carriage, said sup porting frame including means whereby the tracks may be raised and lowered, a supporting bar mounted on said frame structure and adjustable with said tracks, said supporting bar having means for supporting the mouth of the bag.

A. A filled bag sewing machine comprising two spaced I standards, each of which is formed with telescoping sections, means for raising and lowering the upper sections,

tracks carried by said upper sections, a carriage adapted to move back and forth on said tracks, a sewing'machine mounted on said carriage, a supportlng bar carried by said upper telescoping sections and movable up and down with said tracks, said supporting bar having means for supporting the mouth of the bag while it is being stitched.

5. A filled bag sewing machine comprising a supporting frame structure, tracks carried thereby, a carriage adapted to be moved back and forth on said tracks, a sewing machine mounted on said carriage, a supporting bar carried by the frame structure, yielding clamping devices carried by the supporting bar for yieldingly clamping the mouth of the bag for holding the same while it is being stitched.

6. A filled bag sewing machine comprising a supporting frame structure, tracks carried thereby, a carriage adapted to be moved back and forth on said tracks, a sewing machine mounted on said carriage, a supporting bar carried by the frame structure, yielding clamping devices which include a shoulder adapted to engage the under-edge of said bar .and a set screw for engaging the upper edge of saidbar for securing said clamps to said bar, a yielding finger having a curved clamping section, each of said clamps having a roughened portion against which the mouth ofthe bag is pressed by said yielding finger.

In testimony whereof, I aflix my signature.

NORMAN V. CHRISTENSEN. 

